From 06a24dec10bc4014fc0974670627efed68f5da27 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Fri, 12 Oct 2007 23:04:06 +0200 Subject: i386: prepare sharing the hpet code with x86_64 The hpet implementations of i386 and x8664 has been mostly the same before the clock events conversion of i386. The clock events conversion of i386 hpet is already done. So it makes sense to share the code for the x86_64 clock events conversion. Abstract out the mapping functions. Signed-off-by: Thomas Gleixner Signed-off-by: Chris Wright Signed-off-by: Ingo Molnar Signed-off-by: Arjan van de Ven --- arch/x86/kernel/hpet_32.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-) (limited to 'arch') diff --git a/arch/x86/kernel/hpet_32.c b/arch/x86/kernel/hpet_32.c index 533d4932bc7..748abf0286d 100644 --- a/arch/x86/kernel/hpet_32.c +++ b/arch/x86/kernel/hpet_32.c @@ -8,10 +8,9 @@ #include #include +#include #include -extern struct clock_event_device *global_clock_event; - #define HPET_MASK CLOCKSOURCE_MASK(32) #define HPET_SHIFT 22 @@ -22,7 +21,7 @@ extern struct clock_event_device *global_clock_event; * HPET address is set in acpi/boot.c, when an ACPI entry exists */ unsigned long hpet_address; -static void __iomem * hpet_virt_address; +static void __iomem *hpet_virt_address; static inline unsigned long hpet_readl(unsigned long a) { @@ -34,6 +33,17 @@ static inline void hpet_writel(unsigned long d, unsigned long a) writel(d, hpet_virt_address + a); } +static inline void hpet_set_mapping(void) +{ + hpet_virt_address = ioremap_nocache(hpet_address, HPET_MMAP_SIZE); +} + +static inline void hpet_clear_mapping(void) +{ + iounmap(hpet_virt_address); + hpet_virt_address = NULL; +} + /* * HPET command line enable / disable */ @@ -83,7 +93,7 @@ static void hpet_reserve_platform_timers(unsigned long id) memset(&hd, 0, sizeof (hd)); hd.hd_phys_address = hpet_address; - hd.hd_address = hpet_virt_address; + hd.hd_address = hpet; hd.hd_nirqs = nrtimers; hd.hd_flags = HPET_DATA_PLATFORM; hpet_reserve_timer(&hd, 0); @@ -238,7 +248,7 @@ int __init hpet_enable(void) if (!is_hpet_capable()) return 0; - hpet_virt_address = ioremap_nocache(hpet_address, HPET_MMAP_SIZE); + hpet_set_mapping(); /* * Read the period and check for a sane value: @@ -334,13 +344,11 @@ int __init hpet_enable(void) return 0; out_nohpet: - iounmap(hpet_virt_address); - hpet_virt_address = NULL; + hpet_clear_mapping(); boot_hpet_disable = 1; return 0; } - #ifdef CONFIG_HPET_EMULATE_RTC /* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET -- cgit v1.2.3